Table for holding plate-glass.



No. 63I,a57.

Patented Aug. 29, |899. G. A. MARSH.

TABLE FOR HOLDING PLATE GLASS.

(Application filed Feb. 7, 1898.I

2 Sheets-Sheet (No Model.)

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No. 631,857. Patente Aug. 29, |899. G. A. MARSH.

TABLE FUR HLDENG P' E GLASS.

' (Application led Fe'b. B.)

(No Model.) 2 Sheets-Sheet 2 tgl@ m *l WITNESSES:

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UNITED STATES PATENT OFFICE.

GEORGE A. MARSH, OF PITTSBURG, PENNSYLVANIA, ASSIGNOR TO THE MARSH PLATE GLASS COMPANY, OE SAME PLACE.

TABLE FOR HOLDING PLATE-iGLASS.

SPECIFICATION formingpart of Letters Patent No. 631,857, dated August 29, 1899-.

Application filed February 7, 1898. Serial No. 669,440. (No model.)

T0y @ZZ whom, t may concern:

Be it known that I, GEORGE A. MARSH, of Pittsburg, in the county of Allegheny and State of Pennsylvania, have invented a nevir and useful Improvement in Tables for Holding Plate-Glass, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming part of this specification, in Which- Figure l is a top plan view of a table constructed in accordance With my invention. Fig. 2 is a similar View, partly broken away, with the glass in place thereon. transverse section of Fig. 2'. Fig. Il is a top plan view showing the use of my invention with a modified form or construction of supporting-table.

My invention relates to the vacuum-tables employed forholding plate-glass during grinding, rubbing, or polishing; and it consists in an improved construction of such tables and the packing employed thereon, as hereinafter more fully described, and set forth in the claims.'

In the drawings, 2 represents a hollow bed or table having a plain fiat top connected by holes 3 with the vacuum-chamber 4, which communicates with any suitable vacuumforming apparatus by a pipe 5.

In place of a flat plain top I may employ a table having channels extending transversely Fig. 3 is a are shown and described in my prior patents. It willv be understood that in using such form of table the channels in the ribs 8 Will be covered with strips of non-porous packing and that the porous filling Will be arranged over the vacuum-cells Within the non-porous packing. When pieces of cloth or mole-skin of the same size as the table are employed, the portions overlying the channeled ribs, as Well as the edges, should be rendered nonL porous, as hereinbefore described.

I claim- 1. A glass-holding table having its top connected With a vacuum apparatus, a non-porous gasket arranged to be placed beneath the edge portions of the glass sheet, and a porous filling Within the gasket.

2.l A glass-holding table having its top connected with a vacuum apparatus, a non-porous gasket arranged to be placed beneath the portions of the glass sheets to be sealed and a porous illin g of substantially the same thickness as the gasket and integral therewith and arranged to support the intermediate body portion of the glass, substantially as set forth.

3. A glass-holding table provided with intersecting channeled ribs, non-.porous gaskets arranged above the channeled ribs and porous llings arranged intermediate of the gaskets, substantially as set forth.

In testimony whereof I have hereunto set my hand.

GEORGE A. MARSH.

Witnesses:

G. I. HoLDsHIP, C. E. MAOKOWN. 

